
<template>
  <div>
    <div>【数据传递信息】</div>
    <div ref="target" class="w-full h-full"></div>
  </div>
</template>
<script setup>
import { ref, onMounted, watch } from "vue";
import * as echarts from "echarts";
const props = defineProps({
  data: {
    type: Object,
    required: true
  }
});
console.log("数据传递关系图", props.data);

// 1. 初始化echarts实例
let mChart = null;
const target = ref(null);

onMounted(() => {
  mChart = echarts.init(target.value);
  renderChart();
});

// 2. 构建option配置对象
const renderChart = () => {
  const options = {
    xAxis: {
      show: false,
      type: "value"
    },
    yAxis: {
      show: false,
      type: "value"
    },
    series: [
      {
        type: "graph",
        layout: "none",
        coordinateSystem: "cartesian2d",
        symbolSize: 26,
        z: 3,
        edgeLabel: {
          show: true,
          color: "#fff",
          fontSize: 14,
          formatter: function(params) {
            return params.data.speed;
          }
        },
        label: {
          show: true,
          position: "bottom",
          color: "#5e5e5e"
        },
        edgeSymbol: ["none", "arrow"],
        edgeSymbolSize: 8,
        data: props.data.relations.map(item => {
          if (item.id !== 0) {
            return {
              name: item.name,
              category: 0,
              active: true,
              speed: `${item.speed}kb/s`,
              value: item.value
            };
          } else {
            return {
              name: item.name,
              value: item.value,
              symbolSize: 100,
              itemStyle: {
                color: {
                  colorStops: [
                    {
                      offset: 0,
                      color: "#157eff"
                    },
                    {
                      offset: 1,
                      color: "#35c2ff"
                    }
                  ]
                }
              },
              label: {
                fontSize: "14"
              }
            };
          }
        }),
        links: props.data.relations.map((item, index) => ({
          source: item.source,
          target: item.target,
          speed: `${item.speed}kb/s`,
          lineStyle: {
            color: "#12b5d0",
            curveness: 0.2
          },
          label: {
            show: true,
            position: "middle",
            offset: [10, 0]
          }
        }))
      },
      {
        type: "lines",
        coordinateSystem: "cartesian2d",
        z: 1,
        effect: {
          show: true,
          smooth: false,
          period: 4,
          trailLenght: 0,
          symbol: "arrow",
          color: "rgba(55,155,255,0.6)",
          symbolSize: 12
        },
        lineStyle: {
          curveness: 0.2
        },
        data: [
          { coords: [[0, 300],[50, 200]]},
           { coords: [[0, 100],[50, 200]]},
            { coords: [[50, 200],[100, 100]]},
             { coords: [[50, 200],[100, 300]]},
 
        ]
      }
    ]
  };

  // 3.通过实例.setOptions(option)
  if (mChart != null) {
    mChart.setOption(options);
  }
};
watch(
  () => props.data,
  () => {
    renderChart();
  }
);
</script>

<style lang="scss" scoped>
</style>